cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A075599 a(1) = 7 and then the smallest prime that is obtained by placing digits on both sides of the previous term. Or smallest prime that encompasses a(n-1).

Table of values

n a(n)
1 7
2 173
3 11731
4 2117317
5 421173173
6 34211731733
7 1342117317337
8 813421173173377
9 28134211731733771
10 4281342117317337713
11 142813421173173377131
12 21428134211731733771317
13 2214281342117317337713171
14 2022142813421173173377131711
15 1120221428134211731733771317111

List of values

[7, 173, 11731, 2117317, 421173173, 34211731733, 1342117317337, 813421173173377, 28134211731733771, 4281342117317337713, 142813421173173377131, 21428134211731733771317, 2214281342117317337713171, 2022142813421173173377131711, 1120221428134211731733771317111]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.